Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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Study for Failure Examples Involved to Spark Plug Assembling Part Damage, Timing Maladjustment and Alien Substance Insertion in Intake Valve Part on LPG Vehicle Engine

자동차용 LPG 엔진의 점화플러그 장착 부 손상, 점화시기 조정불량, 흡입밸브 부 이물질유입 고장사례 연구

  • Lee, IL Kwon (Division of Automotive Engineering, Daelim University College) ;
  • Kook, Chang Ho (Division of Automotive Engineering, Daelim University College) ;
  • Ham, Sung Hoon (Division of Automotive Engineering, Daelim University College) ;
  • Kim, Sung Mo (Faculty of Aviation, Automobile & Mechanical Engineering, Chungcheong University) ;
  • Hwang, Han Sub (Dept. of Mechanical Engineering, Suwon Science College) ;
  • Jung, Dong Hwa (Dept. of Machinery and Automotive Engineering, Suncheon First College) ;
  • Moon, Hak Hoon (Dept. of Automotive Engineering, Osan University) ;
  • Lee, Jeong Ho (Graduate School of Mechanical Engineering, Inha University)
  • 이일권 (대림대학교 미래자동차공학부) ;
  • 국창호 (대림대학교 미래자동차공학부) ;
  • 함성훈 (대림대학교 미래자동차공학부) ;
  • 김성모 (충청대학교 항공자동차기계학부) ;
  • 황한섭 (수원과학대학교 기계과) ;
  • 정동화 (순천제일대학교 기계자동차과) ;
  • 문학훈 (오산대학교 자동차과) ;
  • 이정호 (인하대학교대학원 기계공학과)
  • Received : 2021.03.22
  • Accepted : 2021.04.16
  • Published : 2021.04.30
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Abstract

This paper is a purpose to study the failure examples for LPG vehicle. The first example, the researcher certified the incongruity phenomenon decreased engine power by ignition fire leakage because of spark plug threaded part damage assembling in cylinder head. The second example, the timing mark that accurately adjusting the camshaft and crankshaft position were twisted about 0.5 block each other. Finally, the researcher seeked the disharmony phenomenon as it couldn't set ignition timing. The third example, the researcher knew the failure phenomenon by interrupted the closing period for intake valve moving with air flow in the number 3 port of cylinder head as the foreign substance in cylinder head didn't remove. Therefore, the manager of a car has to thorough going inspect and the manufacture of a car must remove the cause of failure with quality assurance.

이 논문은 LPG 자동차용 엔진의 고장사례를 연구하여 자동차 생산에 활용함이 목적이다. 첫번째 사례는 엔진의 실린더헤드를 분해하여 확인한 결과 실린더 헤드의 점화플러그가 조립되는 나사부 마멸때문에 점화플러그의 불꽃이 누설되어 출력이 떨어지면서 엔진의 부조화 현상이 가끔 유발되는 것을 발견하였다.. 두 번째 사례는 캠샤프트의 위치와 크랭크 샤프트 위치를 맞춘 타이밍 마크가 0.5칸 틀어져 엔진의 부조화 현상이 발생된 것을 확인되었다. 세 번째 사례는 실린더 헤드를 분해하여 확인한 결과, 실린더 헤드에 제거되지 못한 이물질이 3번 흡기포트에서 공기 흐름에 따라 이동하다가 흡기밸브의 닫힘시기를 원활하지 못하여 하여 고장이 발생된 것을 확인하였다. 따라서, 자동차 관리자는 철저하게 점검해야 하고, 자동차 생산자는 철저한 품질확보를 통해 고장의 원인을 제거해야 할 것으로 판단된다.

Keywords

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